1125520011 has 48 divisors (see below), whose sum is σ = 2032512768. Its totient is φ = 583070400.

The previous prime is 1125520001. The next prime is 1125520027. The reversal of 1125520011 is 1100255211.

1125520011 is a `hidden beast` number, since 112 + 552 + 0 + 0 + 1 + 1 = 666.

It is not a de Polignac number, because 1125520011 - 2⁵ = 1125519979 is a prime.

It is a super-2 number, since 2×1125520011² = 2533590590322880242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1125520001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 273076 + ... + 277166.

It is an arithmetic number, because the mean of its divisors is an integer number (42344016).

Almost surely, 2^1125520011 is an apocalyptic number.

1125520011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1125520011 is a deficient number, since it is larger than the sum of its proper divisors (906992757).

1125520011 is a wasteful number, since it uses less digits than its factorization.

1125520011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512 (or 4509 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 1125520011 is about 33548.7706332140. The cubic root of 1125520011 is about 1040.2021337262.

Adding to 1125520011 its reverse (1100255211), we get a palindrome (2225775222).

It can be divided in two parts, 11255200 and 11, that added together give a palindrome (11255211).

The spelling of 1125520011 in words is "one billion, one hundred twenty-five million, five hundred twenty thousand, eleven".